static Set<S> isVideoFileName_extensions = litciset("3g2",
  "3gp",
  "aaf",
  "asf",
  "avchd",
  "avi",
  "drc",
  "flv",
  "m2v",
  "m4p",
  "m4v",
  "mkv",
  "mng",
  "mov",
  "mp2",
  "mp4",
  "mpe",
  "mpeg",
  "mpg",
  "mpv",
  "mxf",
  "nsv",
  "ogg",
  "ogv",
  "qt",
  "rm",
  "rmvb",
  "roq",
  "svi",
  "vob",
  "webm",
  "wmv",
  "yuv");

static bool isVideoFileName(S s) {
  ret containsNotNull(isVideoFileName_extensions, fileExtensionWithoutDot(s));
}